Southend remain 2nd from bottom and equal City's 31 points thus far, though have played an extra game than the Tigers and have an inferior goal difference.
Leeds are now 4 points adrift at the bottom of the table, but have 2 games in hand of Southend.
QPR remain in 19th place on 33 points. 20th placed Luton's game against Norwich tomorrow has been postponed, while 21st placed Barnsley face Colchester.